Dahlia plant named &#39;Datreogtyve&#39;

ABSTRACT

A new distinct cultivar of  Dahlia  plant named ‘DATREOGTYVE’, characterized by its upright to slightly spreading shape, with stiff and strong lateral stems and thick compound leaves, with up to 15 leaflets. The color of the mature leaves are RHS Yellow-green 147A (upper side) and RHS Grayed-green 191A (Underside). Compound leaves are 10-28 cm in length, and 10-25 cm in width. Only a few single leaves are present near the peduncle. Composite flower heads are 9-11 cm in diameter, with a large number of ray florets (about 150 to 180). The ray florets are RHS White 155C on inner third near base, and RHS Violet 84B on the outer two thirds.

LATIN NAME OF THE GENUS AND SPECIES OF THE CLAIMED PLANT

Dahlia Cav.

VARIETY DENOMINATION

‘DATREOGTYVE’

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Dahlia plant, botanically known as Dahlia Cav., of the Compositae (Asteraceae) family, hereinafter referred to by the cultivar name ‘DATREOGTYVE’.

The new Dahlia cultivar is a product of a planned breeding program conducted by the inventor, Rune Nielsen, in Stige, Denmark. The objective of the breeding program is to develop a new Dahlia cultivar with an upright, strong and healthy growth habit, suitable for large scale container production and with good garden performance; fully double flowers creating globular-shaped flower head (composite flower heads with many ray florets) with an attractive inflorescence color.

The new Dahlia cultivar originated from a cross, made in a controlled breeding program by the inventor in 2008, in Stige, Denmark. The female or seed parent is a Red-purple Dahlia designated 5876G (Breeder's Reference; unpatented). The male or pollen parent is a light Purple-violet Dahlia designated 5187C (Breeder's Reference; unpatented).

Asexual reproduction of the new Dahlia cultivar by terminal cuttings was first performed in September, 2009 in Stige, Denmark, and has demonstrated that the combination of characteristics as herein disclosed for the new cultivar are firmly fixed and retained through successive generations of asexual reproduction. The new cultivar reproduces true to type.

BRIEF SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined to be unique characteristics of ‘DATREOGTYVE’, which in combination distinguish this Dahlia as a new and distinct cultivar:

1. Cultivar with upright to slightly spreading shape; 2. Cultivar with stiff and strong lateral stems and thick compound leaves, with up to 15 leaflets. Color of mature leaves RHS 147A (upper side) RHS 191A (Underside); 3. Compound leaves with 2 to 15 leaflets, 10 - 28 cm in length, and 10-25 cm in width. Only a few single leaves present near peduncle; 4. Composite flower heads, 9-11 cm in diameter, with a large number of ray florets (about 150 to 180); and 5. Ray florets are RHS White 155C on inner third near base, and RHS Violet 84B on the outer two thirds.

Plants of the new Dahlia ‘DATREOGTYVE’ differ from the parent plants in the traits described in Table 1.

(The male and female parents are no longer available for a detailed evaluation. The evaluation is therefore based on historical data.)

TABLE 1 Comparison with Parental Varieties Comparison Comparison New Cultivar Cultivar Cultivar ‘DATREOGTYVE’ 5876G 5187C Trait 6653E Female parent Male parent Plant Size Height: About 40-50 cm. About 25-35 cm. About 50-55 cm. Diameter: About 45-50 cm. About 30-40 cm. About 45-50 cm. Overall Plant Shape: Upright to spreading Upright to spreading Upright to spreading with basal branching. with basal branching. with basal branching. Inflorescences in Inflorescences in Inflorescences in composite heads. composite heads. composite heads. Basal branches with flowers Length: 35-45 cm. 20-30 cm. 45-50 cm. Diameter: 12-16 mm 10-12 mm. 10-16 mm. Strength: Stiff and strong. Stiff and strong. Stiff and strong. Color: Mature: RHS Yellow-green. Yellow-green. Yellow-green 146B. Immature: RHS Yellow-green 146C. Leaves Color mature upper side: RHS Yellow-green 147A. Dark-green. Dark-green. Underside: RHS Grayed-green 191A. Peduncle Color mature: RHS Yellow-green Yellow-green Brown Yellow-green. 146A. at sun exposed parts. Sun exposed parts will get some brownish as dark as RHS Brown 200C. Color of ray florets Upper side: Third near base: Red-purple. Light Purple-violet. RHS White 155C Two third near apex: RHS Violet 84B.

Of the many commercial cultivars known to the present inventor, the most similar in comparison to the new Dahlia ‘DATREOGTYVE’ is the Dahlia cultivar ‘DAELLEVE’ (Patented, U.S. Plant Pat. No. 19,184) in the characteristics described in Table 2:

TABLE 2 Comparison with Comparison Variety New Cultivar New Cultivar ‘DATREOGTYVE’ ‘DAENOGTYVE’ Comparison Cultivar Trait 6653E 6653P (sister) ‘DAELLEVE’ Plant Size Height: About 40-50 cm. About 35-45 cm. About 40-45 cm. Diameter: About 45-50 cm. About 45-50 cm. About 40-45 cm. Overall Plant Shape: Upright to spreading Upright to spreading Cylindrical, a little with basal branching. with basal branching. spreading, with basal Inflorescences in Inflorescences in branching. composite heads. composite heads. Inflorescences in composite heads. Basal branches with flowers Length: 35-45 cm. 30-40 cm. 25-40 cm. Diameter: 12-16 mm 12-16 mm 8-12 mm Strength: Stiff and strong. Stiff and strong. Stiff and strong. Color: Mature: RHS Yellow- Mature: RHS Yellow- RHS Brown 200B. green 146B. green 146B. Immature: RHS Immature: RHS Yellow- Yellow-green 146C. green 146C. Leaves Colour mature upper side: RHS Yellow-green 147A. RHS Yellow-green 147A. RHS Green 139A. Underside: RHS Grayed-green 191A. RHS Grayed-green 191A. RHS Grayed-green 191B. Peduncle Colour mature: RHS Yellow-green 146A. RHS Yellow-green 144A. RHS Brown 200B Colour immature: Sun exposed parts will RHS Yellow-green RHS 146B get some brownish as 144A. dark as RHS Brown 200C. Color of ray florets Upper side: Third near base: White near base to RHS Base: Purple 67A. RHS White 155C Red-purple N74A. Tip: Red-purple 62D. Two third near apex: The amount of white on RHS Violet 84B. ray floret differs from 20-50% (a few even 80%).

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photographs illustrate the overall appearance of the new Dahlia ‘DATREOGTYVE’ showing the colors as true as is reasonably possible with colored reproductions of this type. Colors in the photographs may differ slightly from the color value cited in the detailed botanical description, which accurately describe the color of ‘DATREOGTYVE’.

FIG. 1 shows a close-up view of the composite flower head from ‘DATREOGTYVE’.

FIG. 2 shows a side view perspective of a typical flowering plant of ‘DATREOGTYVE’ in a 19 cm pot, at 8 weeks of age after potting the young plant.

FIG. 3 shows a close-up view of different development stages of the composite flower head of ‘DATREOGTYVE’.

FIG. 4 shows a close-up view of the 150-180 ray florets from one composite flower head of ‘DATREOGTYVE’

FIGS. 5 and 6 show a close-up view of the different compound and single leaf sizes of ‘DATREOGTYVE’.

FIG. 7 shows a comparison between ‘DAELLEVE’, ‘DATREOGTYVE’ (Breeders reference: 6653E) and ‘DAENOGTYVE’, (Breeders reference: 6653P).

DETAILED BOTANICAL DESCRIPTION

The new Dahlia ‘DATREOGTYVE’ has not been observed under all possible environmental conditions. The phenotype of the new cultivar may vary with variations in environment such as temperature, light intensity, and day length without any change in the genotype of the plant.

The aforementioned photographs, together with the following observations, measurements and values describe the new Dahlia ‘DATREOGTYVE’ as grown in a protected environment in a glass, greenhouse in Fyn, Odense, Denmark, under conditions which closely approximate those generally used in commercial practice. During propagation, conducted in a glasshouse, vegetative cuttings were planted 6 Jul. 2011 in small propagation pots with peat as substrate, and then placed in a plastic tunnel averaging about 21° C. and received photoperiodic treatments of 18 hours. Supplementary light was given when natural light fell below 3000-4000 Lux. Rooting occurred about 12 days after planting. In third week after planting the cutting (27 Jul. 2011), young plants were potted in an 19 cm pot in a glass covered greenhouse, maintained at 18° C. to 26° C. during the day, and at 17° C. to 19° C. during the night. Plants were grown under natural daylight conditions. Irrigation was done with water. The EC measured in the soil was maintained between 2.0 to 3.0. One week after potting, the first growth regulation was given: a spray with 85% daminozide, 0.2%, 40-100 ml/m2. During the production time, 9 additional sprayings were given with 85% daminozide, 0.2%, 40-100 ml/m2.

Color references are made to The Royal Horticultural Society Colour Chart (R.H.S.), 2001 edition, except where general colors of ordinaiy significance are used. Color values were taken under September daylight conditions at approximately 12:00 PM and 2:00 PM in Fyn, Odense, Denmark. The age of the ‘DATREOGTYVE’ plants described is 10-11 weeks (including propagation time).

-   Classification:     -   -   Botanical.—Dahlia Cav. -   Parentage:     -   -   Female or seed parent.—Dahlia designated 5876P.         -   Male or pollen parent.—Dahlia designated 5187C. -   Propagation:     -   -   Type.—Vegetative terminate cuttings.         -   Time and temperature to initiate roots.—About 9 to 12 days             at 21° C. in tunnels or flat covered in a greenhouse.         -   Time and temperature to produce a rooted young plant.—About             21 days at 21° C. during rooting phase, followed by 18° C.         -   Rooting habit.—Fine, fibrous; Color of root: RHS             Yellow-white 158C.         -   Tuber development.—Plants might develop tubers in late fall             when planted outside. -   Plant description:     -   -   General appearance and form.—Upright to slightly spreading             shape. Inflorescences in composite heads.         -   Growth rate.—Growing about 4 to 6 cm per week during             production period.         -   Plant height (from soil level to top of plant plane).—About             40-50 cm.         -   Plant width (spread).—About 45-50 cm.         -   Crop time to produce a mature flowering plant.—It requires 3             to 4 weeks to produce a young plant in a 35 mm propagation             plug. After potting 7 to 11 weeks are required to produce             finished flowering plants in 19 cm pots. -   Stem:     -   -   Shape.—Round.         -   Length (pinched above 3 pair of leaves).—About 4-6 cm.         -   Diameter.—About 14-16 mm.         -   Strength.—Stiff and strong.         -   Aspect.—Upright.         -   Texture.—Fluted woody surface.         -   Color.—RHS Yellow-green 146C turning to RHS Gray-brown 199C. -   Branches:     -   -   Branching habit.—Basal branching with lateral branches.         -   Number of basal branches per plant.—About 3-5 (when pinched             above 3 pair of leaves).         -   Length (including flowers).—About 35-45 cm.         -   Diameter.—About 12-16 mm.         -   Strength.—Stiff and strong.         -   Aspect.—Upright to slightly spreading.         -   Texture.—Smooth and glabrous.         -   Color.—Mature: RHS Yellow-green 146B. Immature: RHS             Yellow-green 146C.         -   Internodes length.—About 15-50 mm.         -   Internodes color.—RHS Yellow-green 146B. -   Foliage description:     -   -   Type.—Compound leaves divided into 2-15 leaflets. Only very             few single leaves present, near peduncle.         -   Number of leaves per branch.—About 8-10 per branch.         -   Color of leaves (leaves and leaflets) Color of upper side             (mature) RHS 147A. Color of underside (mature) RHS 191A.             Color of upper side (immature) RHS 147A. Color of underside             (immature) RHS 147C.         -   Venation (leaves and leaflets).—Pattern: Pinnate Color of             upper side: RHS 146A. Color of underside: RHS 146B. -   Compound leaves:     -   -   Number of leaflets per compound leaf.—2-15.         -   Length of compound leaf.—10-28 cm.         -   Width of compound leaf.—10-25 cm.         -   Petiole of compound leaves.—Shape: Semi circular, with deep             furrow on adaxial side. Length: 4-8 cm. Diameter: 4-10 mm.             Texture: Smooth and glabrous. Color: RHS Yellow-green 146B             to RHS Yellow-green 147A.         -   Leaflets of compound leaf.—Terminal leaflet quantity: 1             Terminal leaflet length: 6-18 cm. Terminal leaflet width:             5-9 cm. Terminal leaflet shape: Ovate. Terminal leaflet             shape at apex: Acuminate. Terminal leaflet shape at base:             Cordate to rounded (not always symmetric). Terminal leaflet             margin: Dentate. Terminal leaflet texture (both sides):             Rugose. Rachis length: 1-10 cm. Rachis Diameter: 2-5 mm.             Rachis color: Upper side: RHS Yellow-green 147A. Under side:             RHS Yellow-green 146B. Lateral leaflet quantity: 1-14.             Lateral leaflet length: 3-14 cm. Lateral leaflet width:             3-8 cm. Lateral leaflet overall shape: Ovate. Lateral             leaflet shape at apex: Acuminate (not always symmetric.)             Lateral leaflet shape at base: Rounded (not always             symmetric). Lateral leaflet margin: Dentate. Lateral leaflet             texture (both sides): Rugose.         -   Simple leaves.—Only small leaves near the composit flower             heads. Simple leaves overall shape: Ovate. Simple leaves             shape at apex: Acute. Simple leaves shape at base: Rounded.             Simple leaves length: 6-8 cm. Simple leaves width: 4-6 cm.             Simple leaves margin: Dentate. Simple leaves texture:             Rugose. Petiole shape: Semi circular, with deep furrow on             adaxial side. Petiole length: 0-1 cm. Petiole diameter:             3-5 mm. Petiole texture: Smooth and glabrous. Petiole color:             RHS Yellow-green 146B to RHS Yellow-green 146C. -   Inflorescence description:     -   -   Natural flowering season.—Grown outside as a bedding plant,             flowering occurs continuously during growing season from             spring to autumn/(In Denmark, from June to beginning of             October). Plants can be brought to flower anytime when grown             under the recommended greenhouse conditions.         -   Time to flower.—50 to 80 days from potting a young plant             until flowering.         -   Inflorescence longevity on the plant.—Inflorescence will             maintain good color and substance for about 6-10 days;             however, the longevity of individual inflorescence is highly             dependent on temperature and light conditions. Inflorescence             persistent.         -   Type.—Composite flower heads.         -   Arrangement and shape.—Persistent, single, composite             inflorescences from leaf axils. Disc and ray florets             arranged acropetally in a composite flower head. Upright,             slightly spreading. Terminal young flower head/buds             initially 70-90°. Buds from axillary shoots 70-90°. When             flower opens 30-70°.         -   Quantity of inflorescences heads.—Freely flowering; about 22             buds and open inflorescences per plant.         -   Fragrance.—None.         -   Bud (inflorescences head).—.         -   Rate of opening (from showing color to fully open).—4 to 10             days. The rate of opening is highly dependent on temperature             and light conditions. Length: About 12-16 mm. Diameter:             About 20-24 mm. Shape: Flat globular. Texture: Glabrous,             shining. Color: RHS Yellow-green 144A to Yellow-green N144A             before opening.         -   Peduncle.—From both terminate and axillary shoots. Length:             About 15-22 cm. Diameter: About 4-6 mm. Angle: About 0-20°             from vertical. Strength: Stiff and strong. Texture:             Glabrous. Color (mature/immature): RHS Yellow-green 146A.             Sun exposed parts will get some brownish as dark as RHS             Brown 200C.         -   Inflorescence head.—Depth (height): 5-7 cm. Diameter: 9-11             cm.         -   Ray florets.—Arrangement: Imbricate, in about 11 to 13             whorls of ray florets, each with 12 to 17 florets to equal a             total of about 150-180 ray florets per flower head,             depending on light and temperature conditions. Quantity per             Inflorescence head: 150-180. Length: 45-50 mm. Widths:             24-28 mm. Overall shape: Obovate Apex shape: Obtuse. Base             shape: Acuminate, fused. Margin: Entire. Texture: Upper             side: Glabrous. Under side: Pubescent (small and few).             Colour when opening fused ray floret starting to show color:             RHS Purple-violet N81B. Colour when fully opened Color upper             side: Third near base: RHS White 155C Two third near apex:             RHS Violet 84B. Color underside: RHS Violet 84B, with RHS             White 155C stripes along veins.         -   Disc florets.—Arrangement: 60-75 yellow-orange disc florets             arranged in center of inflorescence head. Appearance:             Quantity per Inflorescence head: 60-75. Length: 7-10 mm.             Diameter: 2 mm. Overall shape: Tubular. Apex shape: Star             with 5 triangular tips. Base shape: Fused to tube. Color RHS             Yellow-orange 21A.         -   Phyllary.—Arrangement: One subtending each floret. Quantity:             210-255. Length: 12-24 mm. Width: 6-10 mm. Overall shape:             Rounded. Shape at apex: Acute with rounded tip. Shape at             base: Fused. Margin: Entire. Color: Mature: RHS Yellow-green             151C. RHS Yellow-green 146A on underside near base of the             phyllaries in the outer whorl, Color: Immature: RHS             Yellow-green 151 C.         -   Brachts.—Arrangement and appearance: Reflexed, involucral             bracts. Quantity: 7-8. Length: 16-20 mm. Width: 8-10 mm.             Overall shape: Subulate. Apex shape: Acute. Base shape:             Sessile. Margin: Entire. Texture: Glabrous. Colour mature             Upper side: RHS 137B. Underside: RHS 137C. Colour immature             Upper side: RHS 137B. Underside: RHS 137C. -   Reproductive organs:     -   -   Androecium.—Location: Disc florets only. Stamen number: 5,             fused into synandrous tube around style. Stamen length:             About 5-7 mm. Anther shape: Tubular. Anther length: About             2-4 mm. Pollen amount: Some. Pollen color: RHS N25C.         -   Gynoecium.—Poorly developed and not present on all flowers.             Location: Ray and disc florets. Quantity: Up to 1. Pistil             length: 7-8 mm. Stigma shape: Bifurcate. Stigma length:             About 2 mm. Stigma color: Not visible due to the cover of             pollen brushed of the anthers. It then appears RHS N25C.             Style length: About 3 mm. Style color: RHS 151C. Ovary             color: RHS 151C. -   Seed/fruit: Seed and fruit production has not been observed. -   Disease/pest resistance: Resistance to pathogens and pests common to     Dahlia has not been observed. -   Disease/pest susceptibility: Susceptibility to pathogens and pests     common to Dahlia has not been observed. -   Temperature tolerance: Plants of the new Dahlia have exhibited good     tolerance rain, wind and drought; however, flowering may cease     during hot periods (temperatures above 25° C.). Low temperature     tolerance to 1° C. -   Growth regulators: Daminozide (85% water soluble dryconcentrate     formulation). 

What is claimed is:
 1. A new and distinct cultivar of Dahlia plant named ‘DATREOGTYVE’, as illustrated and described herein. 